| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Washington Court House | 1 | 14,366 | 14,438 | -0.06% | 1,609 | 9 | City |
| Jeffersonville | 2 | 1,240 | 1,281 | -0.48% | 515 | 2 | Village |
| Bloomingburg | 3 | 852 | 878 | -0.47% | 1,244 | 1 | Village |
| Milledgeville | 4 | 96 | 100 | -1.03% | 960 | 0 | Village |
| Octa | 5 | 58 | 56 | 0% | 200 | 0 | Village |
Washington Court House is the largest city in Fayette County, with a population of 14,366.
Octa is the smallest city in Fayette County, with a population of 58.
There are 5 cities in Fayette County, Ohio.